MLA

McClintock, Walter, 1870-1949. 36. [Meadows of Alpine Bistort ( Polygonum viviparum), Shooting Stars ( Dodecatheon pauciflorum) and Blue Camas ( Camassia quash).]. Box 60, folder 2974. 1941. https://collections.library.yale.edu/catalog/2008418.

APA, 6th edition

McClintock, Walter, 1870-1949. (["Box 60, folder 2974"])(1941)[36. [Meadows of Alpine Bistort ( Polygonum viviparum), Shooting Stars ( Dodecatheon pauciflorum) and Blue Camas ( Camassia quash).]]. https://collections.library.yale.edu/catalog/2008418.